Vacuum cleaner



Aug. 18, 1925. 1,550,198

A. E. BOBST VACUUM CLEANER Filed Sept. 5, 1924 Inver-u Cor Alfred E.Bobst HLs Attorn y To all whom it may concern:

Patented Aug. 18, 1925.

- UNITED STATES issues PATENT OFFICE.

ALFRED E. BOIBS'I, F SGHENEGTADY, NEW YORK, ASSIGNQR WI O ELECTRIC VACU UM CLEANER COMPANY, INC., OF CLEVELAN vacuum appl ication 'filed September Be it known that I, ALFRED E. Bonsa a citizen of the United States, residing at Schenectady, in the county of Schenectady, v

' State of New York, have invented certain new and useful Improvements in Vacuum Cleaners, of which the follow ng 1s a spec1-.

'fication.

The present invention relates to vacuum cleaners and especially to vacuum cleaners of the type having a brush mounted in the suction inlet for engagement with the surface being cleaned. Such brushes, especially when motor-driven, wear off in time and require adjustment, and while the amount of adjustment necessary is not great it is never theless important that provisions be made for such adjustment as is required.

The object of my invention is to provide an improved brush mounting for vacuum cleaner brushes which is simple in structure, readily adjustable, and capable of being manufactured at a low cost, and for a con- 'sideration of what I believe to be novel and my. invention attention is directed to the accompanying description and the claims appended thereto.

In the drawing, Fig. 1 is a face view, partly broken away, of a vacuum cleaner equipped with a brush mounting embodying my invention; Fig. 2 is a face view of the mounting; Fig. 3 is a vertical sectional view through one end of the vacuum cleaner nozzle showing the brush mounting 1n section, and Fig. 4 is a detail sectional view of a modification.

Referring to the drawing, 1 indicates the floor piece of a vacuum cleaner, 2 the suction fan housing, 3 the dust bag, and 4 the handle. The suction fan which is contained in fan housing 2 is driven by an electric motor. The motor-itself does not appear in the drawing, being back of the fan h0using but its shaft is indicated at 5. On shaft 5 is a pulley wheel 6 connected by a belt 7 to a brush 8 mounted in the suction inlet or nozzle 9 of floor piece 1, the brush being thus driven from the motor. On the ends of the brush are stub shafts (not shown) which are journaled in stationary hearings in bearing housings 10, and on the ends of bearing housings 10 are hubs 11 which are attached to the brush supports.

The vacuum cleaner structure so far described is shown only by way of example D, 01110, A CORPORATION or NEW YORK.

CLEANER.

v5, 1924. Serial No. 736,117.

- and is to be take njas typical of any suitable vacuum cleaner towhich my invention may be applied. My invention relates particularly to an mproved mounting for the brush 8 which, 1n the construction illustrated, means a mountmg for the stationary housings 10.

Accorchng to the embodiment .of my invention illustrated in the drawing, I provide mounting blocks 12 which may be in the form of disks or of othersuitable forms and 111 the edge of each disk I provide a slot 13 of a size and depth suitable for receiving hubs 11. Any'suitable means may be used for holding the hubs in slots 13 and preventing their turning therein. In the present instance there are shown for this purpose, sprlng clips 14: whichare attached to blocks 12 by screws 15 and are provided with lnturned edges 16 which engage the knurled surfaces of hubs 11. I

Mounting blocks 12 are attached to the inner surface of the end walls of the cleaner nozzle by means of screws 17 which hold them in position and dowel pins 18 which prevent them from turning. Screws 17 screw into tapped openings 19 in the end walls of the nozzle. Dowel pins 18 are fixed 1 n openings 20 in such end walls and project suitable distances therefrom. In blocks 12 are holes 21 for screws 17 and holes 22 for pins 18. Holes 21 and 22 in width are equal to the diameters of screws 17 and pins 18 respectively. In length, however, they exceed the diameters of the screws and pins respectively by an amount equal to that which it is desired to adjust the brush. For example, if it is desired to provide for an adjustment for the brush of of an inch then the holes are made inch longer than the diameters of the screws and pins. In opposite sides of the blocks are recesses 23 and 24: either of which is adapted to receive, the head 25 of a screw 17. Recesses 23 and 24 are in line with holes 21 and with slot" 13 but are offset from each other in a vertical direction by an amount equal to that which it desired to adjust the brush. For the example given above, they would be offset from each other by of an inch. This is clearly illustrated in Fig. 2 where the one recess appears in full lines and the other in dotted lines, the recess 23 being closer to slot 13 than the recess 24.

When the brush is new, it is held in the upper adjusted position and to accomplish this the mounting blocks 12 are put in position with recesses 24 next to the end walls of the nozzle and recesses 23 on the outside to receive the heads 25 of the screws. This is the position of the parts illustrated 1n Fig. 3, and it will be noted that screw 17 and pin 18 he at the bottoms or lower ends of holes 21 and 22 respectively. Now when the brush becomes worn and it is desired to adjust it downward, the brush is removed from the mounting blocks after which screws .17 are removed and the blocks 12 are reversed so that recesses 24 are on-the outside The screws are then put into place again, the heads 25 now resting in recesses 24. This serves to hold the mounting blocks in a position lower than before by the amount which recesses 23 and 24 are oifset from eabh other. After adjustment, screws 17 lie at the top of holes 21 and pins 18 lie at thetop of holes 22. The brush is then replaced in the mounting blocks. If it is desirable that the spring clips 14 should face always in the same direction then when changing the adjustment of the brush, the right-hand block should be shifted to the left hand end of the nozzle and the lefthand block to the right-hand end of the nozzle. On the other hand, if the construction is such that it is not material as to which way the spring clip holding means or other holding means faces then the mounting blocks may be simply turned over at each end of the nozzle.

In Fig. 4 is shown a modification of the invention wherein a fillister headed fastening screw is used instead of the beveled headed screw as shown in Figs. 1 to 3. Otherwise the arrangement shown in Fig. 4 is the same as that shown in Figs. 1 to 3 and the same reference numerals with the exponent a added are applied to correspending parts.

By my invention, it will be seen that I provide a brush mounting which is simple in structure, easily adjusted, and which permits of the adjustment being made as fine as desired. At the same time, when in ad justed position, the mounting blocks are held firmly in position.

In accordance with the provisions of the patent statutes, I have described the prin-.

through it, a screw which passes thrbugh the hole and threads into an end wall of the nozzle, said hole having its longit 'dinal dimension greater than the diameter 0 the screw, and recesses in opposite sides of the block either of which is adapted to receive the head of the screw, said recesses being offset relatively to each otherin the direction of the longer dimensionof said hole.

2. In a vacuum cleaner, the combination of a nozzle, a brush in the nozzle, mounting means for the brush, said means comprising a block having an elongated hole through it, a screw which passes through the hole and threads into an end wall of the nozzle, said hole having its longitudinal dimension greater than the diameter of the screw, andrecesses in opposite sides of the block either "of which is adapted to receive the head of the screw, said recesses being offset relatively to each other in the direction of the longer dimension of the hole, and separate interengaging means between the block and nozzle end wall for holding the block from turning.

3. In a vacuum cleaner, the combination of a nozzle, a brushin the nozzle; and mounting means for the brush, said mounting means comprising a block having recesses in its opposite faces oil'set relatively to each other and a hole which extends through the block and includes the centers of said recesses, and a screw which is adapted to pass through said hole and thread into an end wall of the nozzle, said hole having a dimension in the direction in which said recesses are offset such that the screw may be passed through it to bring the head into either of said recesses.

4. In a vacuum cleaner, the combination of a nozzle, 9. brush in the nozzle, and mounting means for the brush, said mounting means comprising a block having a slot in its edge to receive a brush bearing, recesses in its opposite faces which are in line with said slot and offset relatively to each other, and a hole which extends through the block and includes the centers of said recesses, and a screw which passes through said hole and threads into an end wall of the nozzle, with its head in one of said recesses.

In witness whereof, I have hereunto set my hand this 4th day of September, 1924.

ALFRED E. BOBST. 

